I'm not a fan of mantras or fancy breathing techniques. For me, it's about breaking down the run into smaller, manageable chunks. When things get tough, I focus on putting one foot in front of the other and getting to the next mile marker. It's not sexy, but it works. And let's be real, sometimes you just gotta suck it up and push through the pain. That's what builds mental toughness.
You're not taking it seriously enough.